Hi Rasha,

As I know, u-boot has a weak support on mmu and cache.

We have enabled mmu and dcache in our u-boot version. But I don't know what your case is.

So I can just give you some suggestions.

1. mmu and dcache should be enabled very early, for example, in start.S or lowlevel_init.S. 2. Although functions in cache-cp15.c are inlined, they will be compiled as functions if you use them. So you may need to modify cache-cp15.c to cache-cp15.h and modify inline functions to macros. 3. Add flush_cache functions. This function is needed in funcion cleanup_before_linux() in cpu.c.

Thanks~~

Yours Terry

-----Original Message----- From: u-boot-bounces@lists.denx.de [mailto:u-boot-bounces@lists.denx.de] On Behalf Of Rasha Eqbal Sent: 2010年7月1日 23:35 To: u-boot@lists.denx.de Subject: Re: [U-Boot] Enabling ARM DCache (and MMU setup) in U-Boot

Hi,

I am having exactly the same problem as described here by Drasko. Once I enable MMU on ARM920T by setting the cp15 register 1, I get a data abort. Since the previous messages were posted a long time back, I was hoping someone has been able to find a solution to the problem. I am trying to setup MMU.

Any help would be greatly appreciated.

Thanks a lot in advance. Rasha